Alkynethiolates, generated from 1,2,3-thiadiazoles by a strong base, react with alcohols and alkanethiols to give thioneesters and dithioesters respectively. In this manner were prepared: dimethyl monothionemalonate, (methoxythiocarbonyl)acetamide, methyl phenylthioneacetate, and ethyl phenyldithioacetate. 2,ω-Diphenyl-1,4-dithiafulvene results from the reaction between lithium 2-phenylethynethiolate and water.